The descriptive audio's already on the list :-)

The way I'd proceed with such a list would probably be to assign a number to each of the video sources and just add the corresponding numbers in brackets to each track on the soundtrack list.

So if DJ's V1 was number 6, Moth3r's Pwnage Edition was nuber 8 and the DeEd 1.0 was number 12 on the list of video sources, the entry for Belbucus' monomix restoration would read:

77 mono mix @ 96kbps ex Mono Mix Restoration Project (sources 6,8,12)

But as you can't be quite sure the exact same files were used for the same mixes in the different releases (I myself don't remember where exactly half of the audio tracks I'm using came from and if they've been recoded at some point) it probably wouldn't be as accurate this way.

On a related note, on your list, DJ's V3 is said to have the monomix at 128kbps as opposed to 96kbps on the other releases. Is this correct? And if so, is there any difference?